Furnace structure.



R. M. SPENCER.

FURNACE STRUCTURE.

APPLlcATloN man 1AN.23. w13.

' Patented Sept. 10, 1918.

4 SHEETS-sham x.

Lmw

' me Hamers ms/e5 co mmmumo. wAsmNcroN. a f:A

R. M. SPENCER. FURNACE STRUCTURE.

APPLICATlON FILED JAN.23. 1913. A

Patented Sept. 10,1918.

@vi/tumba@ I m: wams warns co.. mmm-uma.. wAsHmcnm. n. z:A

R. M. SPENCER.

FURNACE STRUCTURE.

APPLICATION FILED IAN.23. I9I3.

Patented. Sept. 10, 1918.

4 SHEETS-SHEET 3.

l I1 vanto@ @vi/bucco@ m: nomas mens ce pnomruma.. wAsmwcmN. n. c.

R. M. SPENCER.

FURNACE STRUCTURE.

APPLICATION FILED IAN.23. I9I3.

Patented Sept. 10, 1918.

4 SHETS-SHEET 4.

RAYMOND M. SPENCER, 0F COLUMBUS, OHIO, ASSIGNOR TO THE COLUMBUS HEATING&

1 VENTILATING COMPANY, 0F COLUMBUS, OHIO, A CORPORATION OF OHIO.

- FURNACE STRUCTURE.

Application filed January 23, 1913.

T0 all whom it may concern:

Be it known that I, RAYMOND M. SPENCER, a citizen of the United States,residing at Columbus, in the county of Franklin and State of Ohio, haveinvented certain new and useful Improvements in Furnace Structures, vofwhich the following is a specifica'- tion.

M invention relates to furnace structures and 1s particularly directedas an improvement in heating furnaces shown and described in LettersPatent #654,719, dated July 31, 1900. I aim particularly to provide 'animproved construction'of hot air furnace wherein all of the incoming airis Subj ect to a uniform heating as nearly as is possible and incarrying this out, I provide a construction wherein the air to be heatedis directed over all the available heating surfaces and in my preferredconstruction, wherein the combustion chamber extends rearwardly from thefuel chamber, I provide the vertical combustion chamber walls withoutwardly extending flanges from the passageways for the air to beheated, these passagcways gradually increasing in length from thehottest portion of the furnace to the coolest portion and alwaysdirecting the air to be heated over that portion of the structure whichis the hottest.

A further importantfeature of my invention resides in the combination ofa plurality of tubes passing through the furnace structure with a hoodstructure so formed l and arranged as to direct all the air passingdeflecting structure broken away,

Fig. 3 is a section taken through a portion of the combustion chamber,

' Fig. 4 is a view in perspective of one of the air heating tubesillustrating the method of attachment to the combustion chamber,

Fig. 5 is a side elevation partially in secySpecification of LettersPatent.

Patented Sept. 10, 1918.

Serial No. 743,721.

tion of the bottom portion of one of these tubes, and

Fig. 6 is a vertical transverse section taken through the fuel chamberportion of my furnace.

In the drawings, the fuel chamber is shown at 1, as comprising the usualgrate bar construction 2 and side wall construction 3, of any preferredconstruction and having an ash pit 4 below the grate bars, entrance towhich may be had through the usual ash door construction 5, and entranceto the` fuel chamber proper may be had through the fire door 6.Extending rearwardly from the fuel chamber 1 and above the level of thegrate bars 2 is the main combustion chamber 7, which also extendslongitudinally along each side of the re box, as shwn at 8 and 9. Theupper and lower walls 10 and 11 of the combustion chamber are aperturedas desired for the reception of air conducting heating tubes 12 arrangedin any desired number and preferably arranged in staggered relation, asmore clearly shown .in Fig. 2. These conducting air heating tubes areconstructed with a shoulder 13 adjacent their upper ends, which shoulderis adapted toV abut the upper plate 10, a small continuation of the tubeextending through the top plate and being provided with upwardly eX-tending ears 14 apertured for the reception of a locking rod l5. Theupper plate' l0 is also provided with inclined concentric cam trackways16. The lower plate 11 is also apertured and is provided with concentricchannel structures 17 for the reception of the lower portion of theheating tubes. In mounting, the channel construction 17 is lined withasbestos or some similar material and the tubes 12 placed in position,whereupon the top plate 10 is mounted to rest upon the shoulders 13 ofthe tubes 12 and the rods 15 passed through the apertures in theupwardly extending ears 14. By the use of a pipe wrench and twistingthese tubes, the ends of the rods 15 are brought into engagement withthe inclined cam trackways 16 and in this manner the tubes are securelyheld in locked position upon the top plate 10. All of the tubes 12 arealso provided with a series of spiral baiiies 18, each preferablyextending through half the inner periphery of the tubes. By theprovision of these baiiles, the air entering is thoroughly mixed bybeing given rotary motion due 110 te'rrup'ted-by an open space beforeencoun-` tering the vnext baille.

The combustion chamber 7 is preferably supported at one end upon therear wall of the fuel chamber and supported at its rear by the provisionof'a plurality of upwardly 1 extending standards 19. The side walls ofthe combustion chamber are also peferably provided with a series ofupwardly extending lianges 20 being arcuate at the rea-r of the furnace`as shown at 21, being horizontally disposed as at `22 and again beingarcuate as shownv at 23. At the extreme forwardend of the furnace andadjacent the fire box, the flanges are of an upwardly extending zigzagnature as shown at 24. rI`he entire furnace structure is suitablyinclosed within a setting shown as comprising a front cast iron wall 25and a surrounding and covering masonry structure 26 and this masonrystructure is provided with a cold air inlet 50 and hot air outlets 51.The vertical walls of the masonry` structure 26 are preferably spacedfrom the outer extremities of the flanges 20 just a suilicient distanceto allow of dismantling and withdrawing of the side sections of thefurnace proper. It will, therefore, be noted that the flanges 20 allform passageways for the incoming-air to be heated and that thesepassageways successively. increase in length from what is conceded tobethe hottestk portionof the furnace adjacent vthe fire box, to thecoolest portion of the furnace. It will also be noted-that all-thesepassageways direct the incoming rair to a point over the crown 27 of thefuel. chamber or fire box 1. That portion of boththe combustion and fuelchambers through which the tubes 12 pass is covered with a hood ordelecting plate structure as shown particularly in Figs. 1, 2 and 6;That portion which extends from the rear of the combustion chamberforwardly to a point adj acent the crown 27 has been designated 29 andthat portion lying adjacent the front of the fuell chamber and also thatportion' lying over the tubes 12 and which is located longitudinallyofthe fuel chamber and extends inwardly and upwardly has been designated28. Thus, .all of the air which passes through the tubes 12 is directedto a point Vover the crown 27 to cause its thorough comminglingandlikewise the air entering through the passageways formed by thecurved flanges 20 as shown at 21 is gradually led forward to a pointadjacent the fuel chamber and is discharged so that it-commingles. withthe air passing through the spaces formed bythe zigzag flanges 20 and isdischarged to commingle with the air directly over the fuel chamber. lInthis manner, it has been aimed to Vuniformly heat all of the incomingair and to be assured of this,

this incoming air is all directed t0 a point adjacent the top of thefuel chamber so that it will be thoroughly mixed before being withdrawnthrough the hot air outlets 51. The combustion chamber is also providedwith a smoke outlet 30 leading to a smoke pipe 31, under the control ofthe damper j structure-shown at 32. i

v Both side walls of the combustion chamber are shown as formed ofsections 33, 34, 35 and 36, all of-which sections are equal in width.The upper wall of -the combustion ohamber'is made of sections 37, 38, 39and 40 all of a width equal to half the width of the side wall sectionsand is completed by sections 41 and 42 ofa Width equaling the side wallsections. The crown 27 is also formed of sections 43 and 44 equaling thewidth'of sections similar to 40 ofthe upper wallof the combustionchamber and is completed by sections 45 and 46 of a width equaling thewidth of the sections 41Y and42 or the Vside wall section. It w-illbeunderstood that. the grate bars and their complemental structures arealso similarly formed to the crown pieces. The air deflecting plates ,28 and29 are similarly formed in sections of corresponding width. Thus,if it is desired to decrease the capacity Vof `the furnace, the sideseotions 34 may be removed, the upper and lower plates 38 and 39 and theentire rear portion of the combustion chamber moved forward. It will benoted that all the flanges 20 will coincide to form contin uouspassages. c Similarly, if it is Vdesired to 10o increase the capacity,the side sections 34 and the upper and lower sections 38 and 39 may beduplicated and inserted yin their respective positions. If, in thecourse of construction, it is desired to decrease the vol- 105 ume ofthe fuel chamber, this may be done by the removal of such sections 43and 44or section 45 and their complemental structure.

It will, therefore, be noted that such sections as .38, 39 and 40 have awidth dimension that 110 is 'commensurate with the remaining widthdimensions of the other sections -of .the furnace. These sections areallbolted together, as indicated, to form one unitary structure whenassembled. v

The remaining feature of importance of this invention. is the mannerofsupporting the superstructure of the combustion chamber 7 upon itsbase plate. All of the sections vforming this base plate are providedwith nels 47. It will be noted, that this construction, taken inconnection with the method of mounting the air conducting pipes, allowsfor expansion or contraction in practically any degree or in anydirection. The side plates of the fuel chamber are held in unrestrainedextensible movement upward by eliminating all bolted joints about theirconnection with the base plate l1. The air tubesvlQ are allowed asimilar movement by a similar connection with the base plate ll.Inasmuch as extensible movement in a rearward direction would beapproximately the same in the side plates as in the upper and lowerplates, structure especially designed for this movement is notnecessary, since any slight variation would be compensated for by thecompressibility of the asbestos layer. It will thus be noted that I haveprovided a comparatively simple structure for accomplishing the objectsof my invention.

IVhat I claim, is:

l. A furnace comprising a fuel chamber, a rearwardly extendingcombustion chamber, a plurality of outwardly extending flanges on saidcombustion chamber, said flanges being shaped to form upwardly directedair passages at the rear of said combustion chamber, then horizontalpassages and then upwardly directed passages at the front end of thecombustion chamber to direct the air from the rear of the combustionchamber to a point over said fuel chamber, and an inclosingcasingvstructure.

2. A furnace comprising a fuel chamber, a rearwardly extendingcombustion chamber, a plurality of outwardly extending flanges on saidcolnbustion chamber, said flanges being arcuate-ly shaped at the fro-ntand rear ends of said combustion chamber and being horizontally disposedintermediate the front and rear ends to thereby form passages to directthe air from the rear of the combustion chamber to a point over saidfuel chamber, and an inclosing casing structure.

3. A furnace comprising a fuel chamber, a rearwardly extendingcombustion chamber, both of said chambers being provided with outwardlyextending flanges forming passages for the incoming air, said passagesgradually increasing in length from the front of the fuel chamber to therear of the combustion chamber and all formed to dichamber, and aninclosing casing structure.`

4. A furnace comprising a fuel chamber, a rearwardly extendingcombustion chamber, a plurality of tubes passing through said combustionchamber, a defiecting hood extending from the rear of said combustionchamber forward to direct all of the incoming air through said tubesover the top of said fuel chamber, said hood being open over said fuelchamber, and an inclosing casing structure.

5. A furnace comprising a fuel chamber, a rearwardly extendingcombustion chamber, a plurality of tubes. passing through saidcombustion chamber, a deiecting hood extending from the rear of saidcombustion chamber forward to direct all of the incoming air throughsaid tubes over the top of said fuel chamber, said hood being open oversaid fuel chamber, both of said chambers being provided with outwardlyextending flanges forming passages for the incoming air independent ofthe air passing through said tubes, said passages gradually increasingin length from the front of said fuel chamber to the rear of saidcombustion chamber and all formed to direct the air over the top of saidfuel chamber, and an inclosing casing structure.

6. A furnace comprising a fuel chamber, a rearwardly extendingcombustion chamber, a plurality of tubes passing through said combustionchamber, a plurality of tubes passing through said fuel chamber alongthe sides of its fire box, a deflecting hood covering all of said tubesand extending upwardly and inwardly to a point to direct all of theincoming air passing through said tubes into contact with the top ofsaid fuel chamber, said hood being open over said fuel chamber, both ofsaid chambers being provided with outwardly extending fianges formingpassages for the incoming air independent 0f the air passing throughsaid tubes, said passages gradually increasing in length from the frontof said fuel chamber to the rear of the combustion chamber and allformed to direct the air over the top of the fuel chamber, and aninclosing casing structure.

In testimony whereof I aiiix my signature in presence of two witnesses.

RAYMOND M. SPENCER.

Witnesses:

WALTER E. L. BooK, A. L. PHELPS.

Copies at this patent may be obtained for ve cents each, by addressingthe Commissioner of Eatents, Washington, D. G.

